How To Use Heliacal In A Sentence

• The Greeks and Romans, with fairly useless calendars, continued to depend upon observing the heliacal risings and settings of stars.
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• All ancient astrologers placed the greatest significance upon heliacal risings and settings and ancient Mesopotamian astrology was also heavily predisposed to observance of this kind of planetary phenomena.
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• It is possible that all the planetary orbs originate from an early attempt to record heliacal obscurity.
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• the heliacal rising of the Dog Star
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• the heliacal or Sothic year is determined by the heliacal rising of Sothis (the Egyptian name for the Dog Star)
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